Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 41
ds in many partsof the world, varjdng in sizefrom the huge skeleton of theelephant to the tiny shell of themicroscopic animalcule.Fossils di:ffer greatly in kind.Sometimes the entire shell or bone is changed into stone,losing all its animal substance, but retaining its old out-line and its natural… … Fossil of CarboniferousFern. What the Earths Crust is Made of 17
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